[Jprogramming] Programming puzzle

[Oleg Kobchenko]

It could be scan of reflected under reverse
 
   A=: 1 : 'u~/\&.|.'

   +A i.6
15 15 14 12 9 5
   (0+15),(1+14),(2+12),(3+9),(4+5),5
15 15 14 12 9 5

   -A i.6
_15 _13 _10 _6 _1 5
   (0-15),(1-14),(2-12),(3-9),(4-5),5
_15 _13 _10 _6 _1 5


----- Original Message ----
From: Brian Schott <schott.brian at gmail.com>
To: Programming forum <programming at jsoftware.com>
Sent: Thursday, June 15, 2006 2:20:04 PM
Subject: Re: [Jprogramming] Programming puzzle


Henry,

    I am not sure I understand but ...

    Your pattern
dUc cUb bUa aUx where x is an identity element or a zero
element, I am not sure of the terminology, looks like a
simple pattern handled by infix concept 2 U/\ ] applied to
the reverse of the list and then the result reversed.

    But surely this is to simple.

(B=)

On Thu, 15 Jun 2006, Henry Rich wrote:

+ I have a list that ends   ... d c b a .
+
+ I want to create a new list that ends
+
+ ...
+ d' = d U (c U (b U a) U a) U (b U a) U a   = d U c'
+ c' = c U (b U a) U a    =  c U b'
+ b' = (b U a)   = b U a'
+ a' = a
+
+ where U is some verb.
+
+ It seems that there should be some form of / \. etc. that
+ produces this, but I can't find it.  Help!
+
+ Henry Rich
+
+ ----------------------------------------------------------------------
+ For information about J forums see http://www.jsoftware.com/forums.htm
+

(B=) <----------my "sig"

Brian Schott
Atlanta, GA, USA
schott DOT bee are eye eh en AT gee em ae eye el DOT com
http://schott.selfip.net/~brian/
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm